Deprecated: Return type of PhpOfficePhpSpreadsheetWorksheetColumnIterator::current() should either be compatible with Iterator::current(): mixed, or the #[ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in C:inetpubwwwrootdev_iscomsordfulClassesPHPExcelvendorphpofficephpspreadsheetsrcPhpSpreadsheetWorksheetColumnIterator.php on line 135
Deprecated: Return type of PhpOfficePhpSpreadsheetWorksheetColumnIterator::next() should either be compatible with Iterator::next(): void, or the #[ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in C:inetpubwwwrootdev_iscomsordfulClassesPHPExcelvendorphpofficephpspreadsheetsrcPhpSpreadsheetWorksheetColumnIterator.php on line 153
Deprecated: Return type of PhpOfficePhpSpreadsheetWorksheetColumnIterator::key() should either be compatible with Iterator::key(): mixed, or the #[ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in C:inetpubwwwrootdev_iscomsordfulClassesPHPExcelvendorphpofficephpspreadsheetsrcPhpSpreadsheetWorksheetColumnIterator.php on line 145
Deprecated: Return type of PhpOfficePhpSpreadsheetWorksheetColumnIterator::valid() should either be compatible with Iterator::valid(): bool, or the #[ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in C:inetpubwwwrootdev_iscomsordfulClassesPHPExcelvendorphpofficephpspreadsheetsrcPhpSpreadsheetWorksheetColumnIterator.php on line 171
Deprecated: Return type of PhpOfficePhpSpreadsheetWorksheetColumnIterator::rewind() should either be compatible with Iterator::rewind(): void, or the #[ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in C:inetpubwwwrootdev_iscomsordfulClassesPHPExcelvendorphpofficephpspreadsheetsrcPhpSpreadsheetWorksheetColumnIterator.php on line 125
Deprecated: Return type of PhpOfficePhpSpreadsheetWorksheetIterator::current() should either be compatible with Iterator::current(): mixed, or the #[ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in C:inetpubwwwrootdev_iscomsordfulClassesPHPExcelvendorphpofficephpspreadsheetsrcPhpSpreadsheetWorksheetIterator.php on line 55
Deprecated: Return type of PhpOfficePhpSpreadsheetWorksheetIterator::next() should either be compatible with Iterator::next(): void, or the #[ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in C:inetpubwwwrootdev_iscomsordfulClassesPHPExcelvendorphpofficephpspreadsheetsrcPhpSpreadsheetWorksheetIterator.php on line 73
Deprecated: Return type of PhpOfficePhpSpreadsheetWorksheetIterator::key() should either be compatible with Iterator::key(): mixed, or the #[ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in C:inetpubwwwrootdev_iscomsordfulClassesPHPExcelvendorphpofficephpspreadsheetsrcPhpSpreadsheetWorksheetIterator.php on line 65
Deprecated: Return type of PhpOfficePhpSpreadsheetWorksheetIterator::valid() should either be compatible with Iterator::valid(): bool, or the #[ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in C:inetpubwwwrootdev_iscomsordfulClassesPHPExcelvendorphpofficephpspreadsheetsrcPhpSpreadsheetWorksheetIterator.php on line 83
Deprecated: Return type of PhpOfficePhpSpreadsheetWorksheetIterator::rewind() should either be compatible with Iterator::rewind(): void, or the #[ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in C:inetpubwwwrootdev_iscomsordfulClassesPHPExcelvendorphpofficephpspreadsheetsrcPhpSpreadsheetWorksheetIterator.php on line 45
Recently, I updated my PHP version to 8.3, and I’m encountering errors. I’m using an IIS server.